Aimed at the structural characteristics of the double-membrane soil translational pressure transducer

a simplified analysis model is set up to calculate interaction properties of transducer and soil based on orthogonal design by FEM.The calculation results are proved to be reasonable through the calibration test.The study shows that:1)The interactions of the modulus ratio Eg/Es

thickness H

diameter D have significant effect on the matching error only when Eg/Es>1.And the interaction effect are less than the factors’ effect all the time;2)When Eg/Es<1

the order of the factors function is Eg/Es>H>D.When 1<Eg/Es<5

the order is Eg/Es>D>H.When Eg/Es>5

the order is D>H>Eg/Es;3)The matching error increases linearly with thickness and reduces nonlinearly with diameter;4)The modulus ratio is the key factor effecting the matching error.The matching error changes greatly when Eg/Es<1.While Eg/Es>1

the matching error increases with the Eg/Es and is tended to be stable.When Eg/Es≥6.45

8.17

12.18

the corresponding ratio of matching error with the stable matching error is 90 %

95 %

99 %.